Dual-channel wireless signal uplink system and method based on dual Bluetooth and receiver

Abstract

The invention discloses a dual-channel wireless signal uplink system and method based on dual Bluetooth and a receiver, and the system comprises a dual-Bluetooth transmitting terminal which comprises a first Bluetooth module and a second Bluetooth module, the first Bluetooth module is configured to employ a BLE protocol stack for communication, and the second Bluetooth module is configured to employ an EDR Bluetooth protocol stack for communication; and the central receiver comprises a multi-protocol processing unit and a double-antenna array. Through cooperative work of the double heterogeneous Bluetooth protocol stacks and dynamic management of the polarization diversity antenna and the link, the wireless transmission reliability is remarkably improved, the packet error rate can be reduced in the same interference environment, the energy efficiency ratio of the system is dynamically improved through power adjustment and the asymmetric fragmentation technology, the endurance time of portable equipment is prolonged, and the system reliability is improved. According to the technical scheme, data integrity is ensured through a cross-protocol dual-check mechanism, effective data can still be recovered through complementary interpolation when a single link is completely invalid, and a high-adaptability solution can be provided for multi-scene application through the technical scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless transmission, and in particular to a dual-path wireless signal uplink system and method based on dual Bluetooth and receivers. Background Art

[0002] Existing Bluetooth wireless transmission systems mostly use a single protocol stack for data transmission. In complex electromagnetic environments, they are susceptible to interference from Wi-Fi and microwave equipment in the same frequency band, leading to communication interruptions. In traditional solutions, link switching relies on fixed threshold judgments, resulting in high response delays and low spectrum utilization. When the main link fails, existing technologies often take hundreds of milliseconds to restore communication, which cannot meet the real-time requirements of scenarios such as medical monitoring and industrial control.

[0003] Furthermore, single-path data verification mechanisms can accumulate errors in strong interference environments, compromising data integrity. While multi-link transmission solutions exist, most existing technologies utilize the same protocol stack, limiting their anti-interference capabilities and lacking effective cross-protocol data reassembly methods.

[0004] To address the above issues, we have introduced a dual-path wireless signal uplink system and method based on dual Bluetooth and receivers. Summary of the Invention

[0005] The present invention discloses a dual-path wireless signal uplink system and method based on dual Bluetooth and receivers, aiming to solve the technical problems in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A dual-channel wireless signal uplink system and method based on dual Bluetooth and receivers, comprising:

[0008] A dual Bluetooth transmitter includes a first Bluetooth module and a second Bluetooth module, wherein the first Bluetooth module is configured to communicate using the BLE protocol stack, and the second Bluetooth module is configured to communicate using the EDR Bluetooth protocol stack;

[0009] A central receiver, comprising a multi-protocol processing unit and a dual-antenna array, wherein the dual-antenna array adopts an orthogonal polarization layout;

[0010] The link dynamic management module is electrically connected to the dual Bluetooth transmitters and the central receiver, and is used to perform the following operations:

[0011] Real-time monitoring of link quality parameters of the BLE protocol stack and the EDR protocol stack;

[0012] Dynamically select the primary communication link based on a preset switching threshold;

[0013] The data fusion module is configured to perform time stamp alignment and cross-protocol check and reorganization on the dual-channel received data.

[0014] In a preferred solution, the polarization mode of the dual antenna array is 45° and 135° cross-polarization, the antenna isolation in the 2.40-2.48 GHz frequency band is greater than 22 dB, and the voltage standing wave ratio is less than 1.8.

[0015] In a preferred solution, the link dynamic management module includes:

[0016] a Kalman filter configured to predict channel attenuation trends based on historical link quality data;

[0017] The dynamic power adjustment unit controls the transmit power according to the following formula:

[0018] P tx =P base +K p (RSSI target -RSSI real )

[0019] where K p is the proportional coefficient, RSSI target The setting is adjustable from -65dBm to -50dBm.

[0020] In a preferred solution, the data fusion module includes:

[0021] Double buffer memory, storing data packets from the BLE protocol stack and the EDR protocol stack respectively;

[0022] The asymmetric fragment reassembly unit is configured to distribute the original data to the dual-protocol links for transmission in a ratio of 7:3.

[0023] In a preferred solution, the operations performed by the asymmetric fragment reassembly unit include:

[0024] Use CRC-16 check for main link data;

[0025] The auxiliary link data is truncated to 16 bits using the SHA-256 hash check;

[0026] When the primary link verification fails, the auxiliary link data is called for bit-level compensation.

[0027] The method for uplinking dual-channel wireless signals based on dual Bluetooth and receivers includes the following steps:

[0028] S1. Establish parallel communication links through dual protocol stacks, where the first link uses the BLE protocol to transmit on 37 advertising channels, and the second link uses the EDR protocol to transmit on 79 frequency hopping channels;

[0029] S2. Real-time collection of dual-link RSSI values, packet error rates, and delay jitter parameters;

[0030] S3. Calculate the comprehensive quality coefficient LQ based on the link quality assessment model. When the main link LQ value is lower than 0.4, the link switching is triggered.

[0031] S4. Perform timestamp synchronization and cross-protocol redundancy check on dual-channel received data;

[0032] S5. Restore the original data stream through an asymmetric reassembly algorithm.

[0033] In a preferred solution, the calculation formula of the link quality assessment model in step S3 is:

[0034]

[0035] PER is the packet error rate, and jitter is measured in milliseconds.

[0036] In a preferred solution, the cross-protocol redundancy check in step S4 includes:

[0037] Perform the first level CRC-16 check on the BLE link data;

[0038] Perform second-level Manchester encoding check on EDR link data;

[0039] When the dual-link verification results conflict, the valid data packet with the latest timestamp is used first.

[0040] In a preferred embodiment, the asymmetric recombination algorithm in step S5 comprises:

[0041] Construct a receiving state matrix based on the data packet sequence number;

[0042] The dual-link complementary interpolation algorithm is used for the missing data position, and the interpolation formula is:

[0043] V final =αV BLE +(1-α)V EDR

[0044] Here, α is dynamically adjusted according to the current channel signal-to-noise ratio, and the adjustment range is 0.3 to 0.7.

[0045] In a preferred embodiment, the emergency treatment step is also included:

[0046] When the dual-link interruption lasts for more than 200ms, the UWB backup channel is activated to transmit key data frames;

[0047] After the Bluetooth link is restored, a retransmission request for the difference data is executed.

[0048] The dual-channel wireless signal uplink system and method based on dual Bluetooth and receivers provided by the present invention has the following advantages:

[0049] The present invention significantly improves wireless transmission reliability through the collaborative work of dual heterogeneous Bluetooth protocol stacks, combined with polarization diversity antennas and dynamic link management. It can reduce the packet error rate under the same interference environment, dynamically improve the system's energy efficiency through power regulation and asymmetric slicing technology, and extend the battery life of portable devices. The cross-protocol dual verification mechanism ensures data integrity, and can still restore valid data through complementary interpolation when a single link completely fails. Through the above technical solutions, the present invention can provide a highly adaptable solution for multi-scenario applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural diagram of the dual-channel wireless signal uplink system based on dual Bluetooth and receivers proposed by the present invention.

[0051] Figure 2 This is a schematic diagram of the steps of the dual-channel wireless signal uplink method based on dual Bluetooth and receivers proposed by the present invention. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0053] The invention discloses a dual-channel wireless signal uplink system and method based on dual Bluetooth and receivers.

[0054] Reference Figure 1 As shown, the dual-channel wireless signal uplink system based on dual Bluetooth and receivers includes:

[0055] A dual Bluetooth transmitter includes a first Bluetooth module and a second Bluetooth module, wherein the first Bluetooth module is configured to communicate using the BLE protocol stack, and the second Bluetooth module is configured to communicate using the EDR Bluetooth protocol stack;

[0056] A central receiver, comprising a multi-protocol processing unit and a dual-antenna array, wherein the dual-antenna array adopts an orthogonal polarization layout;

[0057] The link dynamic management module is electrically connected to the dual Bluetooth transmitters and the central receiver, and is used to perform the following operations:

[0058] Real-time monitoring of link quality parameters of the BLE protocol stack and the EDR protocol stack;

[0059] Dynamically select the primary communication link based on a preset switching threshold;

[0060] A data fusion module configured to perform timestamp alignment and cross-protocol check and reorganization on dual-channel received data;

[0061] In a preferred embodiment, the polarization mode of the dual antenna array is 45° and 135° cross-polarization, the antenna isolation in the 2.40-2.48 GHz frequency band is greater than 22 dB, and the voltage standing wave ratio is less than 1.8;

[0062] In a preferred embodiment, the link dynamic management module includes:

[0063] a Kalman filter configured to predict channel attenuation trends based on historical link quality data;

[0064] The dynamic power adjustment unit controls the transmit power according to the following formula:

[0065] P tx =P base +K p (RSSI target -RSSI real )

[0066] where K p is the proportional coefficient, RSSI target The setting is adjustable from -65dBm to -50dBm;

[0067] In a preferred embodiment, the data fusion module includes:

[0068] Double buffer memory, storing data packets from the BLE protocol stack and the EDR protocol stack respectively;

[0069] an asymmetric fragmentation and reassembly unit configured to distribute the original data to the dual-protocol links for transmission in a ratio of 7:3;

[0070] In a preferred embodiment, the operations performed by the asymmetric fragment reassembly unit include:

[0071] Use CRC-16 check for main link data;

[0072] The auxiliary link data is truncated to 16 bits using the SHA-256 hash check;

[0073] When the primary link verification fails, the auxiliary link data is called for bit-level compensation;

[0074] The dual Bluetooth transmitter uses a dual-mode chip as the core processor, with the first Bluetooth module operating in BLE 5.2 protocol mode and the second Bluetooth module configured to support Bluetooth 3.0+HS mode with EDR specifications. The central receiver's multi-protocol processing unit has a built-in dual-channel DSP core to process different protocol data streams. The dual antenna array has two element antennas arranged with orthogonal polarization of 45° and 135°. The link dynamic management module connects to the power amplifier via the I2C bus to achieve dynamic adjustment of the transmission power. The specific execution formula is:

[0075] P tx =P base +K p (RSSI target -RSSI real )

[0076] RSSI target The setting is -60dBm, with an adjustment step of 2dBm. The data fusion module is equipped with two 512KB SRAM double-buffer memories. The asymmetric fragmentation and reassembly unit distributes data in a 7:3 ratio. The main link data packet is appended with a CRC-16 checksum, and the auxiliary link data packet uses the first 16 bits of the SHA-256 hash value as a secondary check mark.

[0077] Reference Figure 2 As shown, the method for uplinking dual-path wireless signals based on dual Bluetooth and receivers includes the following steps:

[0078] S1. Establish parallel communication links through dual protocol stacks, where the first link uses the BLE protocol to transmit on 37 advertising channels, and the second link uses the EDR protocol to transmit on 79 frequency hopping channels;

[0079] S2. Real-time collection of dual-link RSSI values, packet error rates, and delay jitter parameters;

[0080] S3. Calculate the comprehensive quality coefficient LQ based on the link quality assessment model. When the main link LQ value is lower than 0.4, the link switching is triggered.

[0081] S4. Perform timestamp synchronization and cross-protocol redundancy check on dual-channel received data;

[0082] S5. Restore the original data stream through an asymmetric reassembly algorithm;

[0083] In a preferred embodiment, the calculation formula of the link quality assessment model in step S3 is:

[0084]

[0085] Where PER is the packet error rate and the unit of jitter is milliseconds;

[0086] In a preferred embodiment, the cross-protocol redundancy check in step S4 includes:

[0087] Perform the first level CRC-16 check on the BLE link data;

[0088] Perform second-level Manchester encoding check on EDR link data;

[0089] When dual-link verification results conflict, the valid data packet with the latest timestamp is used first;

[0090] Reference Figure 1 and Figure 2 As shown, the asymmetric recombination algorithm in step S5 includes:

[0091] Construct a receiving state matrix based on the data packet sequence number;

[0092] The dual-link complementary interpolation algorithm is used for the missing data position, and the interpolation formula is:

[0093] V final =αV BLE +(1-α)V EDR

[0094] Here, α is dynamically adjusted according to the current channel signal-to-noise ratio, and the adjustment range is 0.3 to 0.7.

[0095] It also includes emergency response steps:

[0096] When the dual-link interruption lasts for more than 200ms, the UWB backup channel is activated to transmit key data frames;

[0097] After the Bluetooth link is restored, a retransmission request for the difference data is executed.

[0098] The BLE link transmits vital sign data at a rate of 1 Mbps on channel 37, and the EDR link transmits high-precision waveform data using frequency hopping at f = 2402 + k × 1 MHz (k = 0, 1, ..., 78). The time synchronization error between the two links is controlled within ±3 μs.

[0099] The RSSI value, packet error rate, and delay jitter are collected every 100ms. If the primary link quality factor (LQ) falls below 0.4 three times in a row, the handover process is initiated. The handover process includes:

[0100] a. Send a channel switching notification frame to the transmitter

[0101] b. Pause data transmission for 5ms to reconfigure the protocol stack

[0102] c. Send a synchronization boot sequence on the new link;

[0103] Add timestamp t1 to the received BLE data packet and t2 to the EDR data packet.

[0104] When |t1-t2|>1ms, linear interpolation algorithm is used to compensate for the time difference. The interpolation formula is:

[0105]

[0106] Where T sample is the sampling period;

[0107] When the dual link is interrupted for more than 200ms, the UWB backup channel is activated to transmit critical alarm information until the Bluetooth link is restored.

[0108] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacement may be a replacement of a portion of a structure, device, or method step, or it may be a complete technical solution. Any equivalent replacement or modification based on the technical solution and inventive concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. Dual-channel wireless signal uplink system based on dual Bluetooth and receiver, characterized by: include: A dual Bluetooth transmitter includes a first Bluetooth module and a second Bluetooth module, wherein the first Bluetooth module is configured to communicate using the BLE protocol stack, and the second Bluetooth module is configured to communicate using the EDR Bluetooth protocol stack; A central receiver, comprising a multi-protocol processing unit and a dual-antenna array, wherein the dual-antenna array adopts an orthogonal polarization layout; The link dynamic management module is electrically connected to the dual Bluetooth transmitters and the central receiver, and is used to perform the following operations: Real-time monitoring of link quality parameters of the BLE protocol stack and the EDR protocol stack; Dynamically select the primary communication link based on a preset switching threshold; The data fusion module is configured to perform time stamp alignment and cross-protocol check and reorganization on the dual-channel received data.

2. The dual-channel wireless signal uplink system based on dual Bluetooth and receiver according to claim 1 is characterized in that: The polarization mode of the dual-antenna array is 45° and 135° cross-polarization, the antenna isolation in the 2.40-2.48 GHz frequency band is greater than 22 dB, and the voltage standing wave ratio is less than 1.

8.

3. The dual-channel wireless signal uplink system based on dual Bluetooth and receiver according to claim 1 is characterized in that: The link dynamic management module includes: a Kalman filter configured to predict channel attenuation trends based on historical link quality data; The dynamic power adjustment unit controls the transmit power according to the following formula: P tx =P base +K p (RSSI target -RSSI real ) where K p is the proportional coefficient, RSSI target The setting is adjustable from -65dBm to -50dBm.

4. The dual-channel wireless signal uplink system based on dual Bluetooth and receivers according to claim 1 is characterized in that: The data fusion module includes: Double buffer memory, storing data packets from the BLE protocol stack and the EDR protocol stack respectively; The asymmetric fragment reassembly unit is configured to distribute the original data to the dual-protocol links for transmission in a ratio of 7:

3.

5. The dual-channel wireless signal uplink system based on dual Bluetooth and receivers according to claim 1 is characterized in that: The operations performed by the asymmetric fragment reassembly unit include: Use CRC-16 check for main link data; The auxiliary link data is truncated to 16 bits using the SHA-256 hash check; When the primary link verification fails, the auxiliary link data is called for bit-level compensation.

6. A dual-channel wireless signal uplink method based on dual Bluetooth and receivers, characterized in that: The following steps are involved: S1. Establish parallel communication links through dual protocol stacks, where the first link uses the BLE protocol to transmit on 37 advertising channels, and the second link uses the EDR protocol to transmit on 79 frequency hopping channels; S2. Real-time collection of dual-link RSSI values, packet error rates, and delay jitter parameters; S3. Calculate the comprehensive quality coefficient LQ based on the link quality assessment model. When the main link LQ value is lower than 0.4, the link switching is triggered. S4. Perform timestamp synchronization and cross-protocol redundancy check on dual-channel received data; S5. Restore the original data stream through an asymmetric reassembly algorithm.

7. The dual-channel wireless signal uplink method based on dual Bluetooth and receivers according to claim 6, characterized in that: The calculation formula of the link quality evaluation model in step S3 is: PER is the packet error rate, and jitter is measured in milliseconds.

8. The dual-channel wireless signal uplink method based on dual Bluetooth and receivers according to claim 6, characterized in that: The cross-protocol redundancy check in step S4 includes: Perform the first level CRC-16 check on the BLE link data; Perform second-level Manchester encoding check on EDR link data; When the dual-link verification results conflict, the valid data packet with the latest timestamp is used first.

9. The dual-channel wireless signal uplink method based on dual Bluetooth and receivers according to claim 6, characterized in that: The asymmetric recombination algorithm in step S5 includes: Construct a receiving state matrix based on the data packet sequence number; The dual-link complementary interpolation algorithm is used for the missing data position, and the interpolation formula is: V final =αV BLE +(1-α)V EDR Here, α is dynamically adjusted according to the current channel signal-to-noise ratio, and the adjustment range is 0.3 to 0.

7.

10. The dual-channel wireless signal uplink method based on dual Bluetooth and receivers according to claim 6, characterized in that: It also includes emergency response steps: When the dual-link interruption lasts for more than 200ms, the UWB backup channel is activated to transmit key data frames; After the Bluetooth link is restored, a retransmission request for the difference data is executed.

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